/*
 * ProGuard -- shrinking, optimization, obfuscation, and preverification of Java bytecode.
 *
 * Copyright (c) 2002-2018 GuardSquare NV
 *
 * This program is free software; you can redistribute it and/or modify it under the terms of the GNU General Public
 * License as published by the Free Software Foundation; either version 2 of the License, or (at your option) any later
 * version.
 *
 * This program is distributed in the hope that it will be useful, but WITHOUT ANY WARRANTY; without even the implied
 * warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for more details.
 *
 * You should have received a copy of the GNU General Public License along with this program; if not, write to the Free
 * Software Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
 */
package proguard.ant;

import org.apache.tools.ant.types.DataType;
import proguard.classfile.util.ClassUtil;
import proguard.util.ListUtil;

import java.util.List;

/**
 * This DataType represents a name filter in Ant.
 *
 * @author Eric Lafortune
 */
public class FilterElement extends DataType {
    private String filter;

    /**
     * Adds the contents of this element to the given name filter.
     * 
     * @param filter the list of attributes to be extended.
     * @param internal specifies whether the filter string should be converted to internal types.
     */
    public void appendTo(List filter, boolean internal) {
        // Get the referenced element, or else this one.
        FilterElement filterElement =
            isReference() ? (FilterElement)getCheckedRef(this.getClass(), this.getClass().getName()) : this;

        String filterString = filterElement.filter;

        if (filterString == null) {
            // Clear the filter to keep all names.
            filter.clear();
        } else {
            if (internal) {
                filterString = ClassUtil.internalClassName(filterString);
            }

            // Append the filter.
            filter.addAll(ListUtil.commaSeparatedList(filterString));
        }
    }

    // Ant task attributes.

    public void setName(String name) {
        this.filter = name;
    }

    public void setFilter(String filter) {
        this.filter = filter;
    }
}
